Quick Start Guide ESP-01S

Module Pin Description ESP-01

power supply, better use a standalone, and share ground with uart port

TXD, RXD**

uart interface

RST

Restart on low TTL

CH_PD

1

1

Chip select enable, constant High TTL always

GPIO 15

0

0

Low TTL on boot , N/A for ESP-01

GPIO0

1

0

Switch working / flash mode

GPIO 2

1

1

High TTL on boot

Red LEDs

(cancelled on latest) constants on to show the power status

Blue LEDs

blink when data come through

Module wiring

Pin definition ESP-01

use with CH340 USB-TTL

battery with esp12

Use FT232RL can supply enough power, must be genius IC of course

Swap the uart pins if no data show up on the monitor

There are two leds on the board, one is power led (RED), another one is status LED(BLUE), when power up, pwr led keeps on and status led will blink once.

baud rate may work at 9600 or 115200

Setup Check list

Check list

Description

Check default wifi status

if your devices (e.g. your phone) can find a wifi spot named like "ESP_98529F", "AI-...." or similar, the later number part is the mac ID, if you can see this wifi spot, it means your module boot up successfully